/**
*      author: Y_Yao
*      created: 2025-04-06 17:08:05
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 9e18;
const int INF = 0x3f3f3f3f;

void solve()
{
    int n;
    cin >> n;
    if(n % 2 == 0)
    {
        cout << -1 << endl;
        return;
    }   
    else
    {
        for(int i = 1;i <= n;i++)
        {
            if(i == 1)
            {
                cout << n << " ";
            }
            else
            {
                cout << i - 1 << " ";
            }
        }
        cout << endl;
    }
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}